Enprene 701 Styrene butadiene styrene Enchuan Styrene block copolymer (SBC) >> Styrene butadiene styrene rubber, SBS SEALANT ADHESIVE >> Solvent based >> Contact adhesive Styrene Butadiene styrene thermoplastic elastomer. Enprene 701 provides strength, tackiness and elasticity for a variety of adhesives, from tapes and labels to contact adhesives and mastics. Butadiene/ styrene ratio: 67/33 Styrene butadiene styrene thermoplastic elastomer. Used for a variety of adhesives and mastics. Provides strength, tackiness and elasticity. Butadiene/styrene ratio: 67/33.